Hezekiah Leroy Gordon Smith (September 14, 1909 - September 25, 1967), better known as Stuff Smith, was a jazz violinist. He is known well for the song "If You're a Viper".

Smith was, along with Stéphane Grappelli and Joe Venuti, one of jazz music's preeminent violinists of the swing era. He was born in Portsmouth, Ohio in 1909 and studied violin with his father. Smith cited Louis Armstrong as his primary influence and inspiration to play jazz, and like Armstrong, was a vocalist as well as instrumentalist. In the 1920s he played in Texas as a member of Alphonse Trent's band. After moving to New York he had a regular gig with his sextet at the Onyx Club starting in 1935 and also performed with Coleman Hawkins as well as with younger musicians such as Charlie Parker and Dizzy Gillespie, and later, Sun Ra.